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  <head>
    <title>东方医院</title>
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  <body>

    <!-- ctrl + / -->
    <!-- 导航栏 b4-navbar -->
    <nav class="navbar navbar-expand-sm navbar-dark bg-success">
        <!-- 品牌 -->
        <a class="navbar-brand" href="#">东方医院</a>
        <!-- 把手，手机模式 -->
        <button class="navbar-toggler d-lg-none" type="button" data-toggle="collapse" data-target="#collapsibleNavId" aria-controls="collapsibleNavId"
            aria-expanded="false" aria-label="Toggle navigation">=</button>
        
        <!-- 导航菜单 -->
        <div class="collapse navbar-collapse" id="collapsibleNavId">
            <!-- 菜单 -->
            <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
                <li class="nav-item active">
                    <a class="nav-link" href="#">首页 <span class="sr-only">(current)</span></a>
                </li>
                <!-- shift + alt + 下 -->
                <li class="nav-item">
                    <a class="nav-link" href="#">科室简介</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">门诊挂号</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">体检中心</a>
                </li>
               
                <!-- 下拉展开的菜单 -->
                <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" href="#" id="dropdownId" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">关于</a>
                    <div class="dropdown-menu" aria-labelledby="dropdownId">
                        <a class="dropdown-item" href="#">关于我们</a>
                        <a class="dropdown-item" href="#">医院历史</a>
                        <a class="dropdown-item" href="#">招聘信息</a>
                    </div>
                </li>
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            <!-- 搜索框 -->
            <form class="form-inline my-2 my-lg-0">
                <input class="form-control mr-sm-2" type="text" placeholder="搜索科室、医生">
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    <!-- 巨幕，广告牌 b4-jum -->
    <div class="jumbotron jumbotron-fluid mb-0">
        <div class="container">
            <h1 class="display-3">广告位招租</h1>
            <p class="lead">联系电话：10086</p>
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        <a class="breadcrumb-item" href="dept.html">科室介绍</a>
        <a class="breadcrumb-item" href="clinic.html">门诊挂号</a>
    </nav>

    <!-- 栅格系统/网格系统，12 -->
    <!-- 容器，行，列 -->
    <!-- b4-con -->
    <!-- 设备类型 -->
    <!-- xs 超小屏幕 -->
    <!-- sm 手机 -->
    <!-- md 平板  -->
    <!-- lg 桌面  -->
    <!-- xl 宽屏 -->
    <!-- xxl 超宽屏 -->
    <div class="container-fluid">
        <div class="row">
            <!-- grid-col 4 -->
            <div class="col-lg-4 col-md-6 col-sm-12">
                <!-- b4-list badge -->
                <ul class="list-group">
                    <li class="list-group-item d-flex justify-content-between align-items-center active">
                        收件箱
                        <span class="badge badge-danger badge-pill">9</span>
                    </li>
                    <li class="list-group-item d-flex justify-content-between align-items-center">
                        发件箱
                        <span class="badge badge-success">2</span>
                    </li>
                    <li class="list-group-item d-flex justify-content-between align-items-center disabled">
                        回收站
                        <span class="badge badge-danger badge-pill">999</span>
                    </li>
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            </div>
            <!-- 8 -->
            <div class="col-lg-8 col-md-6 col-sm-12">
                <!-- b4-table -->
                <table class="table">
                    <thead>
                        <tr>
                            <th>表头</th>
                            <th>表头</th>
                            <th>表头</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                            <td>数据</td>
                            <td>数据</td>
                            <td>数据</td>
                        </tr>
                        <tr>
                            <td>数据</td>
                            <td>数据</td>
                            <td>数据</td>
                        </tr>
                        <tr>
                            <td>数据</td>
                            <td>数据</td>
                            <td>数据</td>
                        </tr>
                        
                    </tbody>
                </table>
            </div>
        </div>
    </div>

    <!-- 列表 -->
    <!-- 表单 -->
      
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